Display screen or portion thereof with transitional graphical user interface



This application is related to U.S. patent application Ser. No. 16/379,724, entitled “Mystery Symbol Bonus Symbol Reveal” and U.S. patent application Ser. No. 29/686,999, entitled “Display Screen or Portion Thereof with Transitional Graphical User Interface,” both of which are being filed on the same day as the present application and both of which are hereby incorporated by reference and for all purposes.

FIG. 1 is a first image in a sequence of a display screen or portion thereof with transitional graphical user interface showing our new design;

FIG. 2 is the second image thereof;

FIG. 3 is the third image thereof;

FIG. 4 is a first image in a sequence of a display screen or portion thereof with transitional graphical user interface showing our new design according to a second embodiment;

FIG. 5 is the second image thereof;

FIG. 6 is the third image thereof;

FIG. 7 is a first image in a sequence of a display screen or portion thereof with transitional graphical user interface showing our new design according to a third embodiment;

FIG. 8 is the second image thereof; and,

FIG. 9 is the third image thereof.

The appearance of the graphical user interface transitions sequentially between the images shown in each of the sequences of FIGS. 1-3, 4-6, and 7-9. The process or period in which one image transitions to another forms no part of the claimed design.

The dashed broken line in the perimeter of the drawings illustrates a display screen or portion thereof and forms no part of the claimed design. All other broken lines show portions of the graphical user interface and form no part of the claimed design. 

CLAIM We claim the ornamental design for a display screen or a portion thereof with transitional graphical user interface, as shown and described. 